Apparatus for developing photographic plates by daylight.



T. HEINEN. APPARATUS FOR DEVELOPING PHOTOGRAPHIC PLATES BY DAYLIGHT.

APPLICATION FILED JUNE 9. I915.

Patented N 0v. 21, 1916.

Jaye/72 0)? 9% Aw W855 6S %4 W UNITED STATES PATENT OFFICE,

THEODOR HEINEN, 0F SOLINGEN, GERMANY.

APPARATUS FOR DEVELOPING PHOTOGRAPHIC PLATES BET DAYLIGHT.

Application filed June 9, 1915.

T0 (ZZZ whom it may concern:

Be it known that I, Tnnonon HEINEN, a subject of the German Emperor, andresident of Solingen, Germany, have invented certain new and usefulImprovements in Apparatus for Developing Photographic Plates byDaylight, of which the following is a specification.

This invention relates to an improved apparatus for developingphotographic plates, according to which the plate to be developed may beput by daylight from its holder into the developing receptacle, in

which it can be inspected from both sides during its development.

The accompanying drawing shows the improved apparatus in Figures 1 and 2in a sectional side view and edge view respectively.

In a casing a, which is open at the top, a glass receptacle Z) for thereception of the developing liquid is located, which is also open at thetop and at its bottom provided with closable outlet 0. On its twoopposite sides, the casing a is provided with cut-away portions (Z, drespectively, which are closed by red glasses 6, 6. Over the open-endedtop part of the casing ca hood 7 is located which on its two oppositesides has also two cut-away portions g, g which, upon the hood beingentirely lowered over the casing, correspond with those in the casing.

In the interior of the hood f, a frame Z is suspended from a guide m andin connection with a pin a projecting from the casing. By means of saidpin, the frame Z can be so adjusted that it is placed either directlyabove the open top end of the glass receptacle 7) or upon the cut-awayportion 9 in the hood The pin a is fitted with a catch p, against whicha slide 1' in the frame Z is pressed by action of a spring 8.

To use the developing apparatus, first the hood 7 is so located over thecasing a that the cut-away portions 9, g lie above the upper edge of thecasing a, and the frame Z is moved upon the cut-away portion g, in whichposition it bears with a spring a: against a projection 'w of the hoodand is thus held in the desired position. The pin Z Specification ofLetters Patent.

Patented Nov. 21, 1916.

Serial No. 33,152.

can be so turned in this position of the frame Z that the catch 32liberates the slide 7, in which case the latter is pressed upward byspring 8, whereby the distance between the foot end of the frame Z andthe slide 7 becomes greater than the length of the plate to bedeveloped. Thereupon, the cut away portion g is closed by means of aslide 2' inserted in a guide it of the same, while the holder with theplate to be developed is so introduced in a guide A; in front of thecut-away portion 9 that after removal of the cover of the holder theplate lies opposite to the cut-away portion g. In the holder, springmembers or the like are arranged in a way known in the art, by which theplate is ejected and pressed through the cut-away portion 9 into theframe Z, between the front end of which and the slide 1- the plate isfixed by turning the pin 11- into its initial position. In the hood fthe plate is entirely separated from the daylight. Upon the frame Zbeing then shifted directly above the open top end of the glassreceptacle 6, the hood is lowered over the casing whereby the plate isput into the glass receptacle 6. After removal of slide it, the plateand its development can be inspected from outside through the redglasses 6, e from both sides of the same. The filling of the glassreceptacle Z) takes place through a supply-pipe t arranged on the topend of the hood, and its emptying through the outlet 0.

lVhat I claim, is:-

Apparatus for developing photographic plates by day-light, comprising incombina tion, a casing having an open top end and cut-away portions inits two opposite sides, a red glass in each cut-away portion, glassreceptacle in said casing for the reception of the developing liquidhaving also an open top end, a closable outlet at the bottom end of saidglass receptacle, a hood movably located over the open top end of saidcasing and having also cut-away portions in its two opposite sidescorresponding with those in said casing upon the hood being entirelylowered over the latter, a slide to close one cut-away portion in saidhood, frame movably suspended in said hood for the reception of theplate to be developed and adapt- In testimony whereof I have hereuntovset ed to be located either directly above the my hand in the presenceof two subscribing open end of said receptacle or upon the Witnesses.

other cut-away portion in said hood, and a THEODOR HEINEN. [11. s.]supply-pipe at the top end of said hood, Witnesses:

substantially as and for the purpose set HELEN NUFER,

forth. ALBERT NUFER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D.'C.

